Add iDRAC RAID cleaning steps tests

This adds tests for both the WS-Man and Redfish implementations
of the iDRAC RAID cleaning steps. In this test, storage inventory
input for RAID cleaning is provided by user in JSON format.
The storage inventory is validated against schema once at the
beginning of RAID tests execution and each test checks
test specific requirements before execution.

Change-Id: I183fdc47dbb7a12b2ffb4f8453753dada2d8f5fe
5 files changed